Ключевые слова: acid, america, boiling, color, corrosion, danger, drop, erosion, geology, geysers, green, hot spring, hot springs, landscape, limestone, limestone formations, mountain, natures, old faithful, old faithful basin, panorama, park, spa, spry, steam, sulfur, summer, sun, tourism, toxic, travel, united states, vegetation, water, wyoming, yellow, yellowstone, yellowstone national park,